Generally, a download manager enables downloading of large files or multiples files in one session.
Many web browsers, such as Internet Explorer 9, include a download manager.
Stand-alone download managers also are available, including the Microsoft Download Manager.

if you do not have a download manager installed, and still want to download the file(s) you've chosen, please note:

You may not be able to download multiple files at the same time.
In this case, you will have to download the files individually.
(You would have the opportunity to download individual files on the "Thank you for downloading" page after completing your download.)

Files larger than 1 GB may take much longer to download and might not download correctly.

You might not be able to pause the active downloads or resume downloads that have failed.

The Microsoft Download Manager solves these potential problems.
It gives you the ability to download multiple files at one time and download large files quickly and reliably.
It also allows you to suspend active downloads and resume downloads that have failed.

Installing the newly released Microsoft Windows SDK for Windows 7 and .NET Framework 3.5 SP1 instead of this release is recommended. If you do go ahead and install this SDK after VS2008 SP1, please ensure the patch described in Knowledge Base 974479 is applied. See Overview section for more information.

The Windows SDK for Windows Server® 2008 and .NET Framework 3.5 provides the documentation, samples, header files, libraries, and tools (including C++ compilers) that you need to develop applications to run on Windows Server 2008 and the .NET Framework 3.5. To build and run .NET Framework applications, you must have the corresponding version of the .NET Framework installed.
This SDK is compatible with Visual Studio® 2008, including Visual Studio Express Editions, which are available free of charge.

Please see the
Release Notes for the full list of supported platforms, compilers, and Visual Studio versions and any late breaking issues, including installing the SDK to a custom location. For detailed information about the content in this SDK, including a desription of new content, please see the Getting Started section in the documentation.

We highly recommend that you have your machine fully patched through Microsoft Update before beginning setup.

The .NET Framework 3.0 tools and samples contained in this SDK are designed to work on Windows Server 2008 or Windows Vista® without need of an additional download. If you installed this SDK on Windows XP® or Windows Server 2003, you will need to install the
.NET Framework 3.0

The .NET Framework 3.5 tools and samples contained in this SDK require installation of the .NET Framework 3.5 which is available with Visual Studio 2008 or a standalone install of the .NET Framework 3.5.

Information about obtaining Windows Vista Service Pack 1 is available here

For this release, the Windows SDK is available either thru a

Web Setup that allows you to choose the components of the Windows SDK you wish to download and install, or

DVD ISO image file so that you can burn your own DVD. Due to the large size of the ISO file, we highly recommend that you use a download manager tool to manage the ISO download. To verify that your download of the ISO file for the Windows SDK is correct, check that the CRC and file size match the following: